Yoo Sang-Kyu, Kim Ji-Won, Oh Myung-Hoon, Choi In-Chul
School of Materials Science and Engineering, Kumoh National Institute of Technology, Gumi 39177, Korea.
Materials (Basel). 2022 Sep 2;15(17):6103. doi: 10.3390/ma15176103.
Titanium and titanium alloys possess low density, high specific strength, and excellent corrosion resistance, but are expensive and have low formability at room temperature. Therefore, to reduce cost and achieve excellent properties, titanium and titanium alloys are jointed with aluminum and its alloys, which are inexpensive and have low density and excellent room temperature formability. Cladding is a widely used solid-state bonding technique, and the post-heat treatment of titanium/aluminum clad materials is required to improve their interfacial properties, which is important to ensure the reliability of Ti/Al-clad materials. The interfacial properties of Ti/Al-clad materials are significantly affected by changes in the microstructure and mechanical properties after the post-heat treatment. Thus, in this study, the relationship between the microstructure and mechanical properties at the interface of Ti/Al-clad materials was analyzed after the post-heat treatment at several different temperatures. The thick diffusion and intermetallic compound layer was formed with post-heat treatment owing to the active diffusion of Al atoms. As a result, their uniaxial and nanomechanical properties were varied with the interfacial characteristics of the Ti/Al-clad material.
钛及钛合金具有低密度、高比强度和优异的耐腐蚀性，但价格昂贵且室温下成形性差。因此，为了降低成本并获得优异性能，钛及钛合金与铝及其合金进行连接，铝及其合金价格低廉、密度低且室温成形性优异。包覆是一种广泛应用的固态连接技术，钛/铝包覆材料需要进行后续热处理以改善其界面性能，这对于确保钛/铝包覆材料的可靠性至关重要。钛/铝包覆材料的界面性能在后续热处理后会受到微观结构和力学性能变化的显著影响。因此，在本研究中，分析了钛/铝包覆材料在几种不同温度下进行后续热处理后界面处微观结构与力学性能之间的关系。由于铝原子的活性扩散，后续热处理形成了较厚的扩散层和金属间化合物层。结果，它们的单轴和纳米力学性能随钛/铝包覆材料的界面特性而变化。
